Improvement in valves



UNITED" STATES PATENT OFFICE.

,WILLIAM PAINTER, OF BALTIMORE, MARYLAND.

IMPROVEMENT IN VALVES.

Specification forming part of Letters Patent N o. 175, 144, dated March21, 1876; application filed October 6, 1875.

To all whom it may concern:

Be it known that I, WILLIAM PAINTER, of the city and county of Baltimorein the State of Maryland, have invented certain new and usefulImprovements in Valves; and I do hereby declare that the followingspecification, taken in connection with the drawings furnished, andforming a part of the same, is a clear, true, and complete descriptionthereof.

My improved valves are intended for use in connection with apparatus forremoving the contents of privy-vaults, cess-pools, 860.; and myinvention consists in the combination of a flexible tube, which isnormally partially open and partially closed, with independentlongitudinal supporters, whereby, although said tube is wholly flexible,it is maintained in a longitudinally extended condition, and preventedfrom being forced backward through the valve-opening.

Referring to the drawings, FigureI represents in side elevation one ofmy improved valves located within and combined with a pump-barrel. Fig.2 represents the same in top view. Fig. 3 represents the same invertical section. Fig. 4 represents in perspective one of my valvesmounted on a piston, and in combination with the piston-rods of a pump.

In each instance A denotes the valve-plate, which is provided with aport or opening, as at a, which is usually of large area, to admit freepassage of more or less solid matters. The plate is also, in practice,provided with bolt holes or flanges, whereby it may be secured to apump, pipe, or other device with which it is to be employed. On itsupper surface, surrounding the valve-opening, is a flange to which, bymeans of a band-clamp, the lower and normally open end of the tube B issecured. The tube B is essentially composed of flexible material.

In practice, the lower portion, which is normally open, should beflexible, and constructed in part of heavy canvas or fine wire-clothincorporated in. vulcanized caoutchouc, in a manner well known.

That portion of the tube which is normally closed may be elastic orsimply flexible. In other words, the closed portion may be composedwholly of vulcanized gum compound, or in part of textile fabric.

In the valve shown in Figs. 1,2, and 3, the walls of the pump-barrel, asat O, constitute the independent longitudinal supporters essential withthis form of valve, for preventing the tube from being drawn backwardthrough the valve-opening. The chains at D are connected at their ends,respectively, to the edges of the upper end of the tube, and theinterior of the pump-barrel.

It will be seen that the chains admit of the free opening of the upperportion of the tube by reason of their flexibility, they swinging freelyto and from the sides of the pump-barrel whenever the edges of the valveapproach each other, as is incident to the wide opening of the tube.

In Fig. 4, I show my valve as if mounted on a piston. Although thepiston may be provided with a tubular structure for containingthe valve,I prefer to dispense therewith, and cause the piston-rods to perform thefunction of independent longitudinal supporters for the tube. Thepiston-rods, as at E, are located on each side of the valve, near itsouter edge.

For connecting the upper end of the tube to the rods, chains may beemployed, as shown in Fig. 1, or a rigid connection may be used, asshown in Fig. 4.

In this valve the upper end of the tube is also normally open, and keptdistended by means of a metallic ring, having two lateral arms, one oneach side, which are connected, respectively, to the piston-rods, asshown. In this form of valve the tube should be made somewhat longerthan when the chains are employed, as an extensive area of contact isdesirable between the inner sides or faces of that portion of the tubewhich is normally closed, in order that valve contact may be attainedupon and around solid" matters temporarily retained in the valve whenclosed, and also because it is necessary to counterbalance with exteriorpressure directed against normally closed, in combination withindependent longitudinal supporters, substantially as described, wherebysaid tube, although wholly flexible, is kept longitudinally extended, asset forth.

WILLIAM PAINTER. Witnesses WM. 0. W001), PHILIP F. LARNER.

